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AUREKA LIMITED — Capital/Financing Update 2018
Jun 5, 2018
64352_rns_2018-06-05_1c9cad4a-84ef-48c1-835f-d343bac7b3be.pdf
Capital/Financing Update
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ASX Announcement 6 June 2018
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Navarre Minerals Limited
ABN 66 125 140 105
ASX Code: NML
Corporate Details
Issued capital:
294.6M ordinary shares
8.8M unlisted options
Directors & Management:
Kevin Wilson
(Non-Executive Chairman)
Geoff McDermott
(Managing Director)
John Dorward
(Non-Executive Director)
Colin Naylor
(Non-Executive Director)
Jodi Ford
(Company Secretary)
Shane Mele
(Exploration Manager)
Contact Details
Geoff McDermott
Managing Director
Navarre Minerals Limited
40 - 44 Wimmera Street
Stawell VIC 3380
Australia
PO Box 385
Stawell VIC 3380
Australia
Tel: +61 (0)3 5358 8625
Email: [email protected]
Website: www.navarre.com.au
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First drill results from St Arnaud Gold Project confirm outstanding exploration upside
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First results for two of four lines of reconnaissance air core drilling (80 holes for 6,512m) completed at St Arnaud confirm strong potential for economic gold mineralisation
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Significant results include:
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4m @ 6.6 g/t Au from 48m (SAC022)
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4m @ 5.5 g/t Ag from 36m (SAC015)
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6m @ 2.8 g/t Ag from 59m (SAC019)
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1m @ 1.3 g/t Au from 67m (SAC024)
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1m @ 1.1 g/t Au from 62m (SAC025)
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All mineralised zones remain open and will require follow-up drilling
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Results for remaining two lines of drilling are expected to be received in the next few weeks
Navarre Minerals Limited ( Navarre or the Company; ASX: NML ) is pleased to announce assay results for the first two of four lines of a recently completed air-core (AC) drilling program across several previously undrilled targets at its 100%-owned St Arnaud Gold Project, 250km northwest of Melbourne in Victoria (Figure 1).
Navarre has completed four lines (T1 – T4) of reconnaissance air core (AC) drilling totalling 6,512 metres across 80 holes in its maiden drill program at the St Arnaud Gold Project (Figure 2). Drilling was designed to test for a potential high-grade gold system of similar style to the 6 million-ounce Fosterville Gold Project, located 130km to the east.
The drill targets are situated to the northwest of the historic 0.4Moz St Arnaud Goldfield and are interpreted to be the northward projection of the St Arnaud Goldfield where it occurs beneath shallow Murray Basin cover (of 2 to 25 metres) (Figure 3).
The Company has now received assay results for the first two lines (T1 and T2) of drilling which have returned multiple significant intersections of gold and silver mineralisation, successfully demonstrating the Project’s potential to host economic gold mineralisation.
Drilling on drill traverse T2 intersected 4m @ 6.6g/t Au from 48m (SAC022) on the western edge of a broader 160 metre wide gold zone containing multiple steeply dipping quartz veins on the western edge of a magnetic anomaly. This mineralisation remains open along strike and at depth and warrants follow-up drilling.
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625 e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 2
Highlight results from drill traverses T1 and T2 include (See Tables 1 – 2 and Figures 3 – 5):
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4m @ 6.6 g/t Au from 48m down hole (SAC022)
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1m @ 1.3 g/t Au from within a broader zone of 2m @ 0.8 g/t Au from 67m down hole (SAC024)
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1m @ 1.1 g/t Au from within a broader zone of 15m @ 0.2 g/t Au from 57m down hole (SAC025)
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4m @ 5.5 g/t Ag from 36m and 2m @ 0.6 g/t Au from 11m down hole (SAC015)
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6m @ 2.8 g/t Ag from 59m down hole (SAC019)
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1m @ 0.4 g/t Au from 18m down hole (SAC004)
Navarre believes the St Arnaud Gold Project exhibits several similarities to the world class Fosterville Project and is utilising the extensive knowledge base of the Fosterville gold deposit plus the methodologies developed and applied in the exploration of Navarre’s Tandarra gold discovery in western Victoria (Figure 1) in its exploration approach at the St Arnaud Gold Project.
Samples for the remaining two lines of drilling are progressing through the assay laboratory and results will be released following receipt and interpretation.
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Figure 1: Map showing location of Navarre’s Victorian tenement holdings
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 3
Navarre Managing Director, Geoff McDermott said:
“These are outstanding drilling results. They demonstrate the strong potential for the discovery of economic gold mineralisation associated with the northward projection of the historic St Arnaud Goldfield, under shallow Murray Basin cover.
The drilling has provided an important insight into the geometry and structure of the gold mineralised zones that have remained hidden below Murray Basin cover and delivered compelling new exploration targets that we intend to further assess in the coming months.
The results highlight the excellent gold endowment of the St Arnaud Gold Project and the possibility of identifying shallow high grade gold zones. Following receipt of the remaining assays, we will plan our follow-up drilling campaign.
The latest find caps-off an exciting period of mineral discoveries for Navarre, including Resolution and Adventure lodes at the Irvine Gold Project and an interpreted epithermal gold -silver system at Glenlyle.”
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Figure 2: Air-core drilling at St Arnaud, May 2018
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625 e [email protected] | w navarre.com.au
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Figure 3: St Arnaud Gold Project map showing historic gold production, interpreted mineralised trends and location of four AC drill traverses (Note: EL 4363 is not owned by Navarre Minerals)
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625 e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 5
AC drilling Program
An AC drilling program has been completed over three structural targets identified below an extensive blanket of transported cover (Murray Basin sediments) of up to 25m in thickness. These initial targets were selected based on analysis of a legacy airborne magnetic survey which is interpreted to show the potential mineralised trends of the historic St Arnaud Goldfield projecting up to 10kms north under the Murray Basin cover (Figure 3). Drill targets were refined by comparing the magnetic signatures of the major historic St Arnaud gold mines with similar patterns observed in the buried basement rocks.
The AC program was completed in four east-west drill traverses (T1 – T4 on Figure 3) designed to cross each broad target area. Average drill hole spacing was approximately 40m (east -west) and drill traverse lengths ranged from 600m – 800m long. On average, the AC holes penetrated basement to around 60 - 80m before refusal. Weathering of the basement rocks is reasonably deep at approximately 50m below surface.
Drilling aimed to test intersecting magnetic trends identified along strike from historic hard rock gold workings. Drilling was angled at 60 degrees towards the east ‘heel-to-toe’ to ensure a thorough test across the target areas. The drilling generated a significant number of samples assaying above 0.2g/t gold and 1.0g/t Ag which is very encouraging.
Results for drill traverses T1 and T2 have now been received and are summarised below:
Drill Traverse T1
The 620m long drill traverse T1 (SAC001 – SAC020) targeted the potential northern extension of the West Field trend and intersected low-grade silver and gold mineralisation hosted within a sequence of foliated and quartzveined sediments beneath approximately 10m of Murray Basin cover. A best result of 4m @ 5.5 g/t silver (SAC015) was returned.
Based on drilling to date there is evidence to suggest that the better mineralised areas lie on the western side of the magnetic highs.
Drill Traverse T2
Drill Traverse T2, comprising holes SAC021 – SAC039, is a 600m line of drilling targeting the confluence of the West Field and New Bendigo trends. The drilling has resulted in the discovery of a 160m wide zone of gold mineralisation.
The significant intercept of 4m @ 6.6 g/t gold returned from hole SAC022 was associated with a deep saprolite profile with strong quartz veining beneath approximately 20m of cover. The mineralisation is interpreted to be orientated sub-vertical, parallel to either bedding and cleavage observed in several sticks of core returned in the AC drilling. This observation is consistent with the geometry of the gold workings at the St Arnaud Goldfield.
The mineralisation intersected in this drill traverse differs to that of T1 by being more gold-rich (silver-poor) despite being hosted in a similar sequence of foliated and quartz veined sedimentary rocks.
All mineralised zones intersected by the AC drilling program remain open.
Next Steps
Receive, interpret and announce the results for the remaining two lines of the AC program. Following receipt of these results, follow-up AC drilling will be planned.
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 6
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Figure 4: Cross Section interpretation of Drill Traverse T1
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Figure 5: Cross Section interpretation of Drill Traverse T2
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 7
Background to St Arnaud Goldfield
Alluvial gold was first discovered at St Arnaud in 1855 and was quickly traced to its source in outcropping quartz reefs. By 1860, 47 hard rock mines were in operation. From 1855 to 1916, approximately 400,000ozs of gold were produced at a recovered grade of over 15g/t gold from the hard rock mines.
The St Arnaud Goldfield comprises several lines of reefs which were worked to the edge of the Murray Basin cover. These reef trends are known as the West Field, New Bendigo (Bristol), Nelson (including New Chum line) and East Field (Figure 3).
The Nelson line produced the most gold and was worked over a strike length of 3.2 kilometres to a maximum depth of 685 metres in the goldfields deepest mine, the Lord Nelson Mine. The Lord Nelson Mine was the only mine to produce gold from sulphide ores below a depth of 120m with records showing a total of 323,000 recovered ounces (80% of total goldfield production). Most other mines closed on reaching the water table because the technology was not available to economically treat the sulphide ores in addition to the added cost of pumping mine water.
The Lord Nelson Mine demonstrates the prospectivity of the area in terms of vertical continuity of auriferous reef systems. Ten steep west dipping auriferous quartz reefs of between 0.8m to 7.5m width were worked between 1864 and 1916.
TABLE 1: Significant Air-Core Drill Hole Results
| Traverse No. |
Hole ID | From (m) |
To (m) |
Interval (m) |
Gold (Au g/t) |
Silver (Ag g/t) |
|---|---|---|---|---|---|---|
| T1 | SAC004 | 18 | 19 | 1 | 0.5 | |
| T1 | SAC015 and |
11 | 13 | 2 | 0.6 | 1.4 |
36 |
40 | 4 | 5.5 | |||
| T1 | SAC018 | 81 | 83 | 2 | 0.1 | 0.3 |
| T1 | SAC019 | 59 | 65 | 6 | 0.1 | 2.8 |
| T2 | SAC022 | 48 | 52 | 4 | 6.6 | |
| T2 | SAC023 | 35 | 37 | 2 | 0.3 | |
| T2 | SAC024 incl. |
67 | 69 | 2 | 0.8 | |
| 67 | 68 | 1 | 1.3 | |||
| T2 | SAC025 incl. |
57 | 72 | 15 | 0.2 | |
| 62 | 63 | 1 | 1.1 | |||
| T2 | SAC026 | 47 | 50 | 3 | 0.2 | |
| T2 | SAC037 | 41 | 42 | 1 | 0.2 |
Notes to Table 1:
1. The accuracy of dip, strike and controls on mineralisation is based on interpretation.
2. Sample returns from each metre drilled of every drill hole has been collected and stored on plastic sheeting. Sub-samples submitted for analysis are selected based on geology and mineralisation and range from 1 to 4m composite spear samples.
3. All samples were submitted to ALS Laboratories in Orange NSW and were analysed using a 50g fire assay with AA finish (method: AuAA25) (0.01ppm detection limit). A 35 element Aqua Regia ICP-AES (method: ME-ICP41) analysis was also performed on each sample to assist interpretation of pathfinder elements.
4. g/t (grams per tonne).
5. Assay intersections are continuous zones with nominally less than 1m of internal dilution.
6. No high-grade cut-off has been applied to individual assays.
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 8
TABLE 2: Air-Core Drill Hole Collars (SAC001 to SAC039)
| Hole ID | East (MGA) |
North (MGA) |
RL (AHD) |
Traverse No. |
Depth (m) |
Dip (degrees) |
Azimuth MGA (degrees) |
|---|---|---|---|---|---|---|---|
| SAC001 | 696392 | 5947829 | 300 | T1 | 69 | -60 | 70.0 |
| SAC002 | 696434 | 5947846 | 300 | T1 | 63 | -60 | 70.0 |
| SAC003 | 696473 | 5947862 | 300 | T1 | 60 | -60 | 70.0 |
| SAC004 | 696510 | 5947875 | 300 | T1 | 57 | -60 | 70.0 |
| SAC005 | 696567 | 5947892 | 300 | T1 | 60 | -60 | 70.0 |
| SAC006 | 696606 | 5947898 | 300 | T1 | 56 | -60 | 70.0 |
| SAC007 | 696643 | 5947905 | 300 | T1 | 63 | -60 | 70.0 |
| SAC008 | 696681 | 5947917 | 300 | T1 | 72 | -60 | 70.0 |
| SAC009 | 696719 | 5947925 | 300 | T1 | 60 | -60 | 70.0 |
| SAC010 | 696757 | 5947935 | 300 | T1 | 60 | -60 | 70.0 |
| SAC011 | 696794 | 5947945 | 300 | T1 | 78 | -60 | 70.0 |
| SAC012 | 696831 | 5947951 | 300 | T1 | 60 | -60 | 70.0 |
| SAC013 | 696874 | 5947961 | 300 | T1 | 60 | -60 | 70.0 |
| SAC014 | 696912 | 5947968 | 300 | T1 | 60 | -60 | 70.0 |
| SAC015 | 696951 | 5947976 | 300 | T1 | 97 | -60 | 70.0 |
| SAC016 | 696991 | 5947984 | 300 | T1 | 90 | -60 | 70.0 |
| SAC017 | 696971 | 5947980 | 300 | T1 | 84 | -60 | 70.0 |
| SAC018 | 696933 | 5947971 | 300 | T1 | 99 | -60 | 70.0 |
| SAC019 | 696661 | 5947915 | 300 | T1 | 90 | -60 | 70.0 |
| SAC020 | 696621 | 5947904 | 300 | T1 | 72 | -60 | 70.0 |
| SAC021 | 695801 | 5951276 | 300 | T2 | 69 | -60 | 76.3 |
| SAC022 | 695843 | 5951284 | 300 | T2 | 87 | -60 | 76.3 |
| SAC023 | 695881 | 5951291 | 300 | T2 | 75 | -60 | 76.3 |
| SAC024 | 695923 | 5951301 | 300 | T2 | 75 | -60 | 76.3 |
| SAC025 | 695963 | 5951308 | 300 | T2 | 87 | -60 | 76.3 |
| SAC026 | 696004 | 5951319 | 300 | T2 | 75 | -60 | 76.3 |
| SAC027 | 696043 | 5951326 | 300 | T2 | 71 | -60 | 76.3 |
| SAC028 | 696085 | 5951334 | 300 | T2 | 69 | -60 | 76.3 |
| SAC029 | 696125 | 5951346 | 300 | T2 | 72 | -60 | 76.3 |
| SAC030 | 696165 | 5951357 | 300 | T2 | 78 | -60 | 76.3 |
| SAC031 | 696206 | 5951364 | 300 | T2 | 75 | -60 | 76.3 |
| SAC032 | 696246 | 5951371 | 300 | T2 | 72 | -60 | 76.3 |
| SAC033 | 696286 | 5951381 | 300 | T2 | 72 | -60 | 76.3 |
| SAC034 | 696324 | 5951388 | 300 | T2 | 84 | -60 | 76.3 |
| SAC035 | 696366 | 5951400 | 300 | T2 | 78 | -60 | 76.3 |
| SAC036 | 696400 | 5951408 | 300 | T2 | 90 | -60 | 76.3 |
| SAC037 | 695901 | 5951296 | 300 | T2 | 71 | -60 | 76.3 |
| SAC038 | 695941 | 5951305 | 300 | T2 | 90 | -60 | 76.3 |
| SAC039 | 695982 | 5951313 | 300 | T2 | 84 | -60 | 76.3 |
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625 e [email protected] | w navarre.com.au
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Summary of Navarre’s 2018 Drilling Campaign across its Victoria Project Portfolio
The St Arnaud drilling program is a component of a major drilling campaign of more than 28,000m across five of Navarre’s key project areas during the first half of 2018 which represents the Company’s most expansive field season to date. A summary of the 28,000m drilling campaign is outlined below:
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Ongoing 10,000 metres of AC, RC and diamond core (DD) drilling at the 100%-owned Irvine Gold Project (EL 5476) , targeting Stawell-style gold mineralisation on the flanks of the 9km long Irvine basalt dome, including infill and expansion drilling at Resolution and Adventure lodes (see ASX releases of 1, 10 & 28 May 2018);
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Completion of 6,500 metres of first-pass AC drilling testing in 80 holes for potential Fosterville-style highgrade gold mineralisation in four drill traverses at the St Arnaud Gold Project (EL 6556) (100% Navarre), where the historic St Arnaud Goldfield is believed to continue north under shallow Murray Basin cover (blue area in Figure 1);
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Completion of 900m of first-pass AC drilling targeting potential gold hosted in granite at the Stawell Granite Gold Project (EL 6418) (100% Navarre; reported in ASX release 19 March 2018);
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Completion of 2,100 metres of first-pass AC drilling at 100%-owned Glenlyle Project (EL 5497) resulting in the discovery of an interpreted new epithermal gold-silver system above a deeper porphyry target (reported in ASX release of 23 April 2018); and
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Completion of approximately 9,000m of AC, RC and DD drilling targeting extensions of Bendigo/Fosterville style high-grade gold and the discovery of a deeper gold zone at the Tandarra Gold Project (EL4897) (100% Navarre; Catalyst Metals Ltd (Catalyst, ASX: CYL) earning 51%) (reported in CYL’s ASX release of 27 April 2018).
- ENDS -
For further information, please visit www.navarre.com.au or contact:
Geoff McDermott Managing Director E: [email protected] T: +61 (0)3 5358 8625
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
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Competent Person Declaration
The information in this release that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Shane Mele, who is a Member of The Australasian Institute of Mining and Metallurgy and who is the Exploration Manager at Navarre Minerals Limited. Mr Mele has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration, and to the activity which he is undertaking, to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Mele consents to the inclusion in the release of the matters based on his information in the form and context in which it appears.
Forward-Looking Statements
This announcement contains “forward-looking statements” within the meaning of securities laws of applicable jurisdictions. Forward-looking statements can generally be identified by the use of forward-looking words such as “may”, “will”, “expect”, “intend”, “plan”, “estimate”, “anticipate”, “believe”, “continue”, “objectives”, “outlook”, “guidance” or other similar words, and include statements regarding certain plans, strategies and objectives of management and expected financial performance. These forward-looking statements involve known and unknown risks, uncertainties and other factors, many of which are outside the control of Navarre and any of its officers, employees, agents or associates. Actual results, performance or achievements may vary materially from any projections and forward-looking statements and the assumptions on which those statements are based. Exploration potential is conceptual in nature, there has been insufficient exploration to define a Mineral Resource and it is uncertain if further exploration will result in the determination of a Mineral Resource. Readers are cautioned not to place undue reliance on forward-looking statements and Navarre assumes no obligation to update such information.
About Navarre Minerals Limited:
Navarre Minerals Limited (ASX: NML) is an Australian-based resources company that is creating value from a portfolio of early to advanced stage gold projects in Victoria, Australia (Figure 1).
Navarre is searching for gold deposits in the extension of a corridor of rocks that host the Stawell (~five million ounce) and Ararat (~one million ounce) goldfields. The discovery of outcropping gold at the Irvine Gold Project is a prime focus for the Company. The Project is located 15km south of the Stawell Gold Mine, which Arete Capital Partners has recently acquired from Kirkland Lake Gold Ltd.
The high-grade Tandarra Gold Project is located in close proximity to Kirkland Lake Gold’s world class Fosterville Gold Mine, and 40kms north of the 22 million-ounce Bendigo Goldfield. Exploration at Tandarra is targeting the next generation of gold deposits under shallow cover in the region. Under a farm-out agreement, Catalyst may earn a 51% equity interest in Navarre’s Tandarra Project by spending $3 million over four years to September 2018 by advancing the project towards mineral resource status.
At the Glenlyle Project the Company has identified an epithermal gold-silver system above a potential porphyry copper-gold target that occurs in the same volcanic package that hosts the nearby Thursdays Gossan deposit.
The Company is searching for a potential Fosterville-style high-grade gold mineralisation system at the St Arnaud Gold Project. Several, previously untested, targets have been identified below shallow cover and have been recently drilled in a reconnaissance AC drilling program. Results are expected shortly.
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 11
Appendix 1 JORC Code, 2012 Edition - Table 1
Section 1 Sampling Techniques and Data
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Sampling techniques |
• Nature and quality of sampling (e.g. cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. • Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. • Aspects of the determination of mineralisation that are Material to the Public Report. • In cases where ‘industry standard’ work has been done this would be relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30g charge for fire assay’). In other cases, more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information. |
Air Core Drilling • All air-core (AC) drill holes have been routinely sampled at 1m intervals downhole directly from a rig mounted cyclone. Each metre is collected and placed on a plastic sheet on the ground and generally preserved for assay sub-sampling analysis as required. • Sub-samples for assaying were generated from the 1m preserved samples and were prepared at the drill site by a spear sampling method based on logged geology and mineralisation intervals. Sub-samples were taken at 1m intervals or as composites ranging from 2-4m intervals ensuring a sample weight of between 2 to 3 kg per sub- sample. • The sample size is deemed appropriate for the expected grain size of the material being sampled. • Certified reference material and sample duplicates were inserted at regular intervals with laboratory sample submissions. |
| Drilling techniques |
• Drill type (e.g. core, reverse circulation, open- hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (e.g. core diameter, triple or standard tube, depth of diamond tails, face- sampling bit or other type, whether core is _oriented and if so, by what method, etc). _ |
Air Core Drilling • AC drilling was carried out using a Wallis Mantis 80 Air- core rig mounted on a Landcruiser base. The AC rig used a 3.5” blade bit to refusal, generally just below the fresh rock interface. |
| Drill sample recovery |
• Method of recording and assessing core and chip sample recoveries and results assessed. • Measures taken to maximise sample recovery and ensure representative nature of the samples. • Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. |
Air Core Drilling • AC drill recoveries were visually estimated as a semi- quantitative range and recorded in the log. • Recoveries were generally high (>90%), with reduced recovery in the initial near-surface sample. • Samples were generally dry, but many became wet at the point of refusal in hard ground below the water table. • No sampling issue, recovery issue or bias was picked up and is considered that both sample recovery and quality is adequate for the drilling technique employed. |
| Logging | • Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. • Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. • The total length and percentage of the relevant intersections logged. |
• Geological logging of samples followed Company and industry common practice. Qualitative logging of samples included (but was not limited to); lithology, mineralogy, alteration, veining and weathering. • All logging is quantitative, based on visual field estimates. • A small representative sample was retained in a plastic chip tray for future reference and logging checks. • Detailed chip logging, with digital capture, was conducted for 100% of chips logged by Navarre’s geological team. |
| Sub-sampling techniques and sample preparation |
• If core, whether cut or sawn and whether quarter, half or all core taken. • If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. |
• Company procedures were followed to ensure sub- sampling adequacy and consistency. These included (but were not limited to), daily work place inspections of sampling equipment and practices. |
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
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| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| • For all sample types, the nature, quality and appropriateness of the sample preparation technique. • Quality control procedures adopted for all sub- sampling stages to maximise representivity of samples. • Measures taken to ensure that the sampling is representative of the in-situ material collected, including for instance results for field duplicate/second-half sampling. • Whether sample sizes are appropriate to the grain size of the material being sampled. |
• Blanks and certified reference materials are submitted with the samples to the laboratory as part of the quality control procedures. Air Core Drilling • AC composite, 1m individual and EOH samples were collected as spear samples. • Samples were recorded as dry, damp or wet. • Drill sample preparation and base metal and precious metal analysis is undertaken by a registered laboratory (ALS Orange, NSW). Sample preparation by dry pulverisation to 85% passing 75 microns. • The sample sizes are considered appropriate to correctly give an accurate indication of mineralisation given the qualitative nature of the technique and the style of gold mineralisation sought. |
|
| Quality of assay data and laboratory tests |
• The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. • For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. • Nature of quality control procedures adopted (e.g. standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (i.e. lack of bias) and precision have been established. |
• Analysis for gold is undertaken at ALS Orange, NSW by 50g Fire Assay with an AAS finish to a lower detection limit of 0.01ppm Au using ALS technique Au-AA26. • ALS also conducted a 35 element Aqua Regia ICP-AES (method: ME-ICP41) analysis on each sample to assist interpretation of pathfinder elements. • No field non-assay analysis instruments were used in the analyses reported. • A review of certified reference material and sample blanks inserted by the Company indicate no significant analytical bias or preparation errors in the reported analyses • Internal laboratory QAQC checks are reported by the laboratory and a review of the QAQC reports suggests the laboratory is performing within acceptable limits. |
| Verification of sampling and assaying |
• The verification of significant intersections by either independent or alternative company personnel. • The use of twinned holes. • Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. • Discuss any adjustment to assay data. |
• Samples are verified by Navarre geologists before importing into the drill hole database. • No twin holes have been drilled by Navarre during this program. • Primary data was collected for drill holes using a Geobase logging template on a Panasonic Toughbook laptop using lookup codes. The information was sent to a database consultant for validation and compilation into a SQL database. • Reported drill results were compiled by the Company’s geologists and verified by the Exploration Manager and Managing Director. • No adjustments to assay data were made. |
| Location of data points |
• Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. • Specification of the grid system used. • Quality and adequacy of topographic control. |
• All maps and locations are in UTM Grid (GDA94 zone 54). • All drill collars are initially measured by hand-held GPS with an accuracy of+3metres. On completion of program, a contract surveyor often picks-up collar positions utilising a differential GPS system to an accuracy of+0.02m. • At the St Arnaud Gold Project, topographic control is achieved via using DGPS co-ordinates from contract surveyors. Air Core Drilling • Down-hole surveys have not been undertaken |
| Data spacing and distribution |
• Data spacing for reporting of Exploration Results. • Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation |
• Variable drill hole spacings are used to adequately test targets and are determined from geochemical, geophysical and geological data together with historic mining information. • Drillingreported in thisprogram is of an earlyexploration |
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 13
| Criteria JORC Code explanation |
Criteria JORC Code explanation |
Commentary |
|---|---|---|
| procedure(s) and classifications applied. • Whether sample compositing has been applied. |
nature and has not been used to estimate any mineral resource or ore reserves. • Refer to sampling techniques, above for sample compositing |
|
| Orientation of data in relation to geological structure |
• Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. • If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. |
• Exploration is at an early stage and, as such, knowledge on exact location of mineralisation, in relation to lithological and structural boundaries, is not accurately known. • The drill orientation is attempting to drill perpendicular to the geology and mineralised trends. Due to the early stage of exploration it is unknown if the drill orientation has introduced any sampling bias. This will become more apparent as further drilling is completed. |
| Sample security |
• The measures taken to ensure sample security. |
• Chain of custody is managed by internal staff. Drill samples are stored on site and transported by a licenced reputable transport company to a registered laboratory in Orange, NSW (ALS Laboratories). At the laboratory samples are stored in a locked yard before being processed and tracked through preparation and analysis. |
| Audits or reviews |
• The results of any audits or reviews of sampling techniques and data. |
• There has been no external audit or review of the Company’s sampling techniques or data at this stage. |
Section 2 Reporting of Exploration Results
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| Mineral tenement and land tenure status |
• Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. • The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area. |
• The St Arnaud gold project is located within Navarre’s 100% owned “St Arnaud” exploration licence EL 6556 which was granted on 21 August 2017 for an initial period of 5 years. • The tenement is current and in good standing. • The project occurs on a combination of freehold and crown land. |
| Exploration done by other parties |
• Acknowledgment and appraisal of exploration by other parties. |
• Most exploration in the area has concentrated on the known extents of the historic St Arnaud Goldfield. • In the late 1960’s Planet Metals undertook an assessment of the historic St Arnaud Goldfield. Ten diamond drill holes were proposed to test the potential of the field however, these were not drilled. • In 1984, General Gold Resources NL undertook a 10 hole diamond drill program of approximately 2,500m testing targets on the New Bendigo and Nelson Lines. • Compass Minerals took over the exploration licence and formed a Joint Venture with WMC who tested the shallow potential of the northern end of the field. The licence then passed to Glenburn Manor in 1992 (International Minerals NL) who carried out further shallow percussion and diamond drilling and mined a small open pit. This operation ceased in 1995. • Sedimentary Holdings Ltd drilled 2 diamond holes in 2006, to test the possible extensions of the Lord Nelson workings. These drill holes confirmed the continuation of the mineralised structure. • In 2008 Rex Minerals Ltd undertook a 4,800m drilling program targeting gold mineralisation below several of the richest historic hard rock mine workings. A detailed |
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625 e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 14
| Criteria | JORC Code explanation | Commentary |
|---|---|---|
| airborne magnetic survey was also flown to identify if the mineralised lines of the St Arnaud Goldfield project north under Murray Basin cover. |
||
| Geology | • Deposit type, geological setting and style of mineralisation. |
• The project area is considered prospective for the discovery of gold deposits of similar character to those historically mined in the adjacent St Arnaud Goldfield. The St Arnaud Goldfield has produced approximately 0.4 million ounces of gold from hard rock sources. The St Arnaud Goldfield comprises several lines of reefs which were worked to the edge of the Murray Basin cover. These reefs were known as the West Field, New Bendigo (Bristol), Nelson (including New Chum line) and East Field. • The Nelson line produced the most gold and was worked over a strike length of 3.2km to a maximum depth of 685m in the goldfields deepest mine, the Lord Nelson Mine. The Lord Nelson Mine was the only mine to produce gold from sulphide ores below a depth of 120m with records showing a total of 323,000 recovered ounces (80% of total goldfield production). • The Lord Nelson Mine demonstrates the prospectivity of the area in terms of vertical continuity of auriferous reef systems. Mineralisation is associated with steep west dipping faults ranging in size from 10cm to several metres. Gold is commonly located within laminated quartz veins in the fault zone or in low angle extension quartz veins extending up to 5m from the related fault zone. Ten auriferous quartz reefs of between 0.8m to 7.5m width were worked in the Lord Nelson Mine between 1864 and 1916. |
| Drill hole Information |
• A summary of all information material to the understanding of the exploration results including a tabulation of the following information for all Material drill holes: o easting and northing of the drill hole collaro elevation or RL (Reduced Level – elevationabove sea level in metres) of the drill hole collar o dip and azimuth of the holeo down hole length and interception deptho hole length.• If the exclusion of this information is justified on the basis that the information is not Material and this exclusion does not detract from the understanding of the report, the Competent Person should clearly explain why this is the case. |
• Reported results are summarised in Figures 2, 4, 5 and Tables 1 & 2 within the main body of the announcement. • Drill collar elevation is defined as height above sea level in metres (RL) • Drill holes were drilled at an angle deemed appropriate to the local structure and stratigraphy and is tabulated in Table 2. • Hole length of each drill hole is the distance from the surface to the end of hole, as measured along the drill trace. |
| Data aggregation methods |
• In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (e.g. cutting of high grades) and cut-off grades are usually Material and should be stated. • Where aggregate intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail. • The assumptions used for any reporting of metal equivalent values should be clearly stated. |
• All reported assays have been average weighted according to sample interval. • No top cuts have been applied. • An average nominal 0.1g/t Au or greater lower cut-off is reported as being potentially significant in the context of this drill program. • No metal equivalent reporting is used or applied. |
| Relationship between |
• These relationships are particularly important in the reporting of Exploration Results. |
Air Core Drilling • The exactgeometryand extent of any primary |
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au
N a v a r r e M i n e r a l s L i m i t e d ( N M L ) A S X A n n o u n c e m e n t P a g e | 15
| Criteria JORC Code explanation |
Criteria JORC Code explanation |
Commentary |
|---|---|---|
| mineralisation widths and intercept lengths |
• If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported. • If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (e.g. ‘down hole length, true width _not known’). _ |
mineralisation is not known at present due to the early stage of exploration. • Mineralisation results are reported as “down hole” intervals as true widths are not yet known. |
| Diagrams | • Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported These should include, but not be limited to a plan view of drill hole collar locations and appropriate sectional views. |
• Refer to diagrams in body of text |
| Balanced reporting |
• Where comprehensive reporting of all Exploration Results is not practicable, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. |
• All drill hole results received to date have been reported in this announcement. • No holes are omitted for which complete results have been received. |
| Other substantive exploration data |
• Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observations; geophysical survey results; geochemical survey results; bulk samples – size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. |
• All relevant exploration data is shown in diagrams and discussed in text. |
| Further work | • The nature and scale of planned further work (e.g. tests for lateral extensions or depth extensions or large-scale step-out drilling). • Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive. |
• Areas of positive AC drill results are expected to be followed up with further drilling. |
Navarre Minerals Limited | ABN 66 125 140 105 40 - 44 Wimmera Street | PO Box 385 | Stawell VIC 3380 Australia t +61 3 5358 8625
e [email protected] | w navarre.com.au